Contributor(s): Professor John Mearsheimer | In this lecture John Mearsheimer explains why US foreign policy so often backfires and what can be done to set it straight. John Mearsheimer is the R. Wendell Harrison Distinguished Service Professor at the University of Chicago. Peter Trubowitz (@ptrubowitz) is Department Head of International Relations and Director of the US Centre at the London School of Economics and Political Science and Associate Fellow at Chatham House, Royal Institute of International Affairs. The Department of International Relations (@LSEIRDept) is now in its 91st year, making it one of the oldest as well as largest in the world. They are ranked 5th in the QS World University Ranking by Subject 2018 tables for Politics and International Studies. The LSE's United States Centre (@LSE_US) is a hub for global expertise, analysis and commentary on America. Our mission is to promote policy-relevant and internationally-oriented scholarship to meet the growing demand for fresh analysis and critical debate on the United States. Twitter Hashtag for this event: #LSEGreatDelusion